BAY POINT — A 19-year-old Concord woman died after a shooting near Highway 4 late Tuesday that officials believe is gang-related, the Contra Costa Sheriff”s Office said Wednesday morning.

Authorities said the shooting is related to another incident on the freeway over the weekend, when a 20-year-old man died after he was shot by a motorist and crashed on the freeway.

In the latest shooting, two people in one car were struck by gunfire, but the car continued driving to John Muir Medical Center in Concord, where the 19-year-old woman was pronounced dead, according to Capt. Dan Hoffman with the Contra Costa Sheriff”s office. She was later identified as Patricia Ochoa, of Concord. The condition of the second person, a male, was not released.

The Sheriff”s Office said more information was expected to be available later Wednesday morning.

The shooting comes three days after 20-year-old Tomas Mendez, of Pittsburg, was shot by another motorist while driving on eastbound Highway 4 near Bailey Road about 2:55 p.m. Saturday. Mendez crashed into a center divide after being shot, and firefighters responding to the crash found him on the highway. He was pronounced dead there.